Upon completion of
在…结束的时候
🧩 词语组成解析
upon
[ə'pɑn]
prep. 在…上面;当…时候;
of
[əv]
prep. 关于;属于…的;由…制成;
aux. 助动词 [非标准用语、方言] =have [主用于虚拟语气];
🗣️ 情景例句
Smoking will give you cancer.
吸烟会导致癌症。
What time are you leaving?
你几点钟走？
from which can be seen the strata the drill has been cutting through.
从中能看出钻头所钻透的地层。